Four Axis Stepper Motor Precision Jaws

Four independent jaw blades each positioned via a leadscrew
driven by a 1.8 deg stepper motor integrated into a custom vacuum enclosure.
This eliminates the requirement for additional chamber Jaw blade position
feedback via motor step counting in the subsequent motion control electronics.

Optionally conductive linear potentiometers can be specified
to provide absolute position measurement or rotary incremental encoders
can be fitted to the rear of the motor shafts.

Additional reference positions to be obtained from
end-of-travel limit switches located at fully open position on each axis.